Corporation stop



Patented Oct. 12, 1943 H. Fawley, Decatur, Ill., assignors to Mueller 00., Decatur, Ill., a corporation of Illinois Original application October 15, 1938, Serial No. 235,246, now Patent No. 2,247,427, dated July Divided and this application April 15, 1940, Serial No. 329,812

4 Claims.

This invention relates to corporation stops and has as its particular object to produce a stop having'features enabling it to be effectively engaged by an improved inserting or removing I tool such as is disclosed in our copending application Serial No. 235,246, filed October 15, 1938, Patent No. 2,247,427, issued July 1, 1941, of which this application is a division. A preferred embodiment, with reference to which description of the invention will be made, is shown in the accompanying drawing in which:

Figure 1 shows a side elevation of the new stop with an inserting tool applied thereto, the tool being shown in axial section.

Figure 2 is a side elevation of the stop at 90 to the position shown in Figure 1.

Figure 3 is a section substantially on line 33 of Figure l, and

Figure 4 is an end View of the stop.

In the drawing, reference numeral 1!] designates the stop as a whole and reference numeral l I the tool. The stop comprises a bodyl i having at its ends threaded nipples l3 and M of which the former is adapted to be threaded into a main and the latter is adapted to receive a threaded connection in use. As here shown, the body has opposite parallel sides 15 and I6 which extend to the base of the nipple M. The

other sides 11 and I8 of the body are also parallel but are more widely spaced apart than the sides I and it so that the body is oblong in cross section with its opposite sides in large portion in parallel planes. 7

A bore I9 extends throughout the nipples and body and is intersected by a conical valve seat in the body H, the axis of this seat extending with the minor dimension of the body so that adequate metal at the sides of the seat is provided by the major body dimension. A conical plug 2!], provided at its large end with a rib 2!, is engaged with the seat and secured through a nut 22 and Washer 26.

Adjacent nipple [4 the side walls Hand I3 are inset through shoulders 25 and 26 to parallel faces 21 and 28 which are spaced apart a.

distance substantially the same as the minor cross dimension of the body so that a squared portion or parallelepiped formation 23 is provided on the body immediately at the base of the nipple I l. The end margins of walls 15 and 16 included in this squared portion are designated by the reference numerals l5 and It. The axial dimensionof faces 21 and 28, in a stop of the size shown is desirably about one-fifth of the axial dimension of the faces I! and I8.

The tool H comprises a shank portion 29' and a coaxial cylindrical head portion 30 provided with a coaxial threaded socket 3| adapted to engage the threads of nipple l4. Embracing head 30 and axially slidable thereon is a ring 32 which is yieldably projected to the limit position shown in Figure 1 by springs 33 and 34, the ring being retracible to an opposite limit position against the action of the springs. .Ring 32 has an annular surface 35 remote from shank 29 on which are formed diametrically opposite lugs 36 and 31. Lug 36 has an inner face 33 in a plane parallel to; the ring axis and spaced somewhat further from this axis than are the faces l5, I6, 21 and 23, of the squared portion 23, from thestop axis. Lug 36 has a flat end face 39 at its leadingportion and has a bevelled portion 48 at its trailing portion joining face 39 with the face 35 of ring 32. Lug-39 is formed the same as lug 38 and has an inner face 41 spaced from the ring axis the same as face 38 of lug 36. Lug 31 has also the flat end face 42 at its leading position and a trailing bevelled-off portion 43- I Tool H is designed for purposes of stop insertion. To apply the tool, ring 32 is slid back on head 33 so that the lugs are relatively retracted. Nipple it of the stop is threaded into socket 3i but before jamming of the engaged thread occurs, ring 32 is released and is projected by springs 33 and 34 to the relation shown in Figures 1 and 3. In these figures, the inside lug faces 38 and 41 lie alongside faces 2'? and 28 of the squared portion of the stop body. With the tool thus applied to the stop, shank 29 may be coupled with the usual boring bar and nipple 13 inserted in a threaded opening in the .main. Upon turning the tool in the inserting direction, the leading portions of lug faces 38 and M will engage the leading portions of stop faces 2i and 28 and rotation will be imparted in the stop in the threading-in direction without any binding of nipple M in socket 3| in which it is only partially engaged. The threaded connection between the stop and tool merely serves to hold the two together, torque being applied to the stop solely through the lugs 36 and 31. Consequently, after the stop has been fully inserted, the tool may be freely turned in the unthreading direction, the inner edges of the bevelled portions 40 and 43 of the lugs at this time being cammed away from the stop by the trailing portions or edges of the faces of the squared portion 23 of the stop body. The lugs 36 and 31 are in effect pawls which are operative to transmit rotation of the tool to the stop in one direction but ride over the encountered portions of the stop body upon reverse rotation. It will be understood that either set of opposite faces of, the squared portion 23 of .the stop body is cooperable with the tool lugs.

The squared portion is kept as large as possible perimetrically so that the torque which is ordinarily applied at the corners of the squared portion is transmitted to the stop at a maximum distance from the stop axis. While it is .desirable that the squared portion be large, it should also be kept well within the dimensions of the body portion, in order that there will be no-extensions beyond this body portionandthe -tool for inserting the stop can bekept within'reasonable limits as to size. Thus, faces I5 and N3 of the squared portion are spaced apart the same distance as faces l5 and I6 while faces 21 and 28 are brought in from faces I! and [8 only enough to give the squared relation. The body portion is .kept at minimum size compatible with adequate strength. For example, as has been stated above, the spacing between the walls I I and IB is sufficient to provide adequate thickness of material between the plug seat and these Walls, i. e., in a direction radially of the axis of the plug seat. In addition, while the 'ends of walls i1 and t8 are inset to form thefaces 21 and 28 adjacent the service pipe nipple, the points on the inset portions closest to the plug seat axis will nevertheless be adequately spaced from the plugseat so as to give sufficient thicknessofmaterial in this portion of the body.

The squared formation is identically cooperable with a removing tool constructed on the principal of the illustrated inserting tool. This tool, with the squared "formation with which it cooperates, may be kept within reasonable limits as to size and is symmetrical in its formation, since it cooperates with the even-sided squared formation. In the removing tool, the lugs are reversed so that upon'threading the tool on nipple H, the lugs will 'ride over the corners of the squared portion and will grip opposite faces of the squared portion 'upon reverse rotation of the tool.

Whilea preferred form'of stop has been shown and described, :it will be understood that 'variations in details of form may be made without departure from the invention as defined in the following claims.

We claim:

1. A corporation stop comprising a body and threaded service pipe and main engaging nipples projecting from opposite ends of the body, said service pipe nipple being engageable by a turning tool for the purpose of threading the main engaging nipple into an opening in a main, said body having a square portion immediatelyadjacent said service pipe nipple symmetrically disposed relative to the latter, said body having a transverse plug seat and having substantially parallel side walls substantially normal to the seat axis, the end portions of said side walls -adjacent said service pipe nipple constituting opposite sides of said square portion, the spacing said last named walls being inset at their ends adjacent said service pipe nipple to form the remaining two sides of said square portion, the

point on the inset closest to the seat axis being sufiiciently spaced from said seat to provide adequate material radially of the seat axis at such point.

"-2. A corporation stop having a plug-receiving body portion, a threaded main-engaging nipple extending from one side of said body portion, a threaded service pipe nipple extending from the opposite side of said body portion, and a toolengageable square section formed on said stop between said body portion and said service pipe nipple and lying within the dimensions of said body portion for screwing the step into the main by a tool engageable with said threaded service pipe nipple and with the lateral faces of said square section when the tool is moved axially on said threaded service pipe nipple.

3. A corporation stop having a plug-receiving body portion, a threaded main-engaging nipple extending from one side of said body portion, a threaded service pipe nipple extending from the opposite side of said body portion, and a square section formed on said stop between said body portion and said service pipe nipple and inset on two sides from said body portion to form a square having tool-engageable surfaces of less dimensions than said body portion, to provide means for screwing the stop into the main by a tool axially 'engageable with saidthreaded service pipe nipple and with the lateral faces of said square section when the tool is run down on said threaded service pipe nipple.

4. A corporation stop including a body portion, a threaded service pipe nipple and a threaded main engaging nipple projecting from-opposite ends of the body portion and connected by a flow bore, a seat bore in the body portion extending transversely of the flow bore, said body portion including two exterior walls parallel to each other and to said seat bore axis and also havingtwo surfaces normal to said axis and said walls, the'dimension of said body portion between said walls being greater than the dimension between said surfaces to provide adequate body portion thickness radially of the seat bore axis, said walls being recessed adjacent said service pipe nipple to form a second pair of surfaces parallel to said Walls and normal to said firstmentioned surfaces, said second-named surfaces having such dimension between them as to cooperate with said first-named surfaces in forming a square section adjacent said service pip nipple adapted to be engaged by a tool moved axially of saidservice pipe-nipple.

FRANK H. MUELLER. WALTER J. BOWAN. ELMER H. FAWLEY. 

